oops anotehr vipsthumbnail fix

since "strategy" is now named "access"

TODO

@@ -10,6 +10,9 @@
 
   does vips_malloc() used the tracked mem system?
 
+- do much fancier profiling with timing on all locks saved in memory and
+  dumped on exit
+
 - use the webp advanced encoding api to set a write function for webp save to
   file
 

tools/vipsthumbnail.c

@@ -350,7 +350,7 @@ thumbnail_shrink( VipsObject *thumbnail, VipsImage *in,
 		"tile_width", in->Xsize,
 		"tile_height", 10,
 		"max_tiles", (nlines * 2) / 10,
-		"strategy", VIPS_ACCESS_SEQUENTIAL,
+		"access", VIPS_ACCESS_SEQUENTIAL,
 		"threaded", TRUE, 
 		NULL ) ||
 		vips_affine( t[4], &t[5], residual, 0, 0, residual, NULL,